diff --git a/src/vm/asmjit/vm_tgc5c.cpp b/src/vm/asmjit/vm_tgc5c.cpp
index c99cc8a..eb13809 100644
--- a/src/vm/asmjit/vm_tgc5c.cpp
+++ b/src/vm/asmjit/vm_tgc5c.cpp
@@ -2364,7 +2364,7 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "ecall";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -2401,7 +2401,7 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "ebreak";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -2438,7 +2438,7 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "mret";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -2475,7 +2475,7 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "wfi";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3388,7 +3388,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__addi4spn"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.addi4spn"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3436,7 +3436,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c__lw"),
+                "{mnemonic:10} {rd}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c.lw"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("uimm", uimm), fmt::arg("rs1", name(8+rs1)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3482,7 +3482,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs2}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c__sw"),
+                "{mnemonic:10} {rs2}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c.sw"),
                 fmt::arg("rs2", name(8+rs2)), fmt::arg("uimm", uimm), fmt::arg("rs1", name(8+rs1)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3525,7 +3525,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__addi"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.addi"),
                 fmt::arg("rs1", name(rs1)), fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3572,8 +3572,8 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
-            std::string mnemonic = "c__nop";
+            //No disass specified, using instruction name
+            std::string mnemonic = "c.nop";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
             jh.disass_collection.push_back(mnemonic_ptr);
@@ -3609,7 +3609,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c__jal"),
+                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c.jal"),
                 fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3653,7 +3653,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__li"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.li"),
                 fmt::arg("rd", name(rd)), fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3700,7 +3700,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__lui"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.lui"),
                 fmt::arg("rd", name(rd)), fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3744,7 +3744,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {nzimm:#05x}", fmt::arg("mnemonic", "c__addi16sp"),
+                "{mnemonic:10} {nzimm:#05x}", fmt::arg("mnemonic", "c.addi16sp"),
                 fmt::arg("nzimm", nzimm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3789,8 +3789,8 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
-            std::string mnemonic = "__reserved_clui";
+            //No disass specified, using instruction name
+            std::string mnemonic = ".reserved_clui";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
             jh.disass_collection.push_back(mnemonic_ptr);
@@ -3828,7 +3828,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c__srli"),
+                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c.srli"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("shamt", shamt));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3869,7 +3869,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c__srai"),
+                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c.srai"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("shamt", shamt));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3923,7 +3923,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__andi"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.andi"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -3965,7 +3965,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__sub"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.sub"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4007,7 +4007,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__xor"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.xor"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4048,7 +4048,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__or"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.or"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4089,7 +4089,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__and"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.and"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4129,7 +4129,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c__j"),
+                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c.j"),
                 fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4171,7 +4171,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__beqz"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.beqz"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4220,7 +4220,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__bnez"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.bnez"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4269,7 +4269,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {nzuimm}", fmt::arg("mnemonic", "c__slli"),
+                "{mnemonic:10} {rs1}, {nzuimm}", fmt::arg("mnemonic", "c.slli"),
                 fmt::arg("rs1", name(rs1)), fmt::arg("nzuimm", nzuimm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4317,7 +4317,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, sp, {uimm:#05x}", fmt::arg("mnemonic", "c__lwsp"),
+                "{mnemonic:10} {rd}, sp, {uimm:#05x}", fmt::arg("mnemonic", "c.lwsp"),
                 fmt::arg("rd", name(rd)), fmt::arg("uimm", uimm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4367,7 +4367,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__mv"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.mv"),
                 fmt::arg("rd", name(rd)), fmt::arg("rs2", name(rs2)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4413,7 +4413,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c__jr"),
+                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c.jr"),
                 fmt::arg("rs1", name(rs1)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4459,8 +4459,8 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
-            std::string mnemonic = "__reserved_cmv";
+            //No disass specified, using instruction name
+            std::string mnemonic = ".reserved_cmv";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
             jh.disass_collection.push_back(mnemonic_ptr);
@@ -4498,7 +4498,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__add"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.add"),
                 fmt::arg("rd", name(rd)), fmt::arg("rs2", name(rs2)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4546,7 +4546,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c__jalr"),
+                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c.jalr"),
                 fmt::arg("rs1", name(rs1)));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4595,8 +4595,8 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
-            std::string mnemonic = "c__ebreak";
+            //No disass specified, using instruction name
+            std::string mnemonic = "c.ebreak";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
             jh.disass_collection.push_back(mnemonic_ptr);
@@ -4634,7 +4634,7 @@ private:
             /* generate disass */
             
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs2}, {uimm:#05x}(sp)", fmt::arg("mnemonic", "c__swsp"),
+                "{mnemonic:10} {rs2}, {uimm:#05x}(sp)", fmt::arg("mnemonic", "c.swsp"),
                 fmt::arg("rs2", name(rs2)), fmt::arg("uimm", uimm));
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4679,7 +4679,7 @@ private:
         if(this->disass_enabled){
             /* generate disass */
             
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "dii";
             InvokeNode* call_print_disass;
             char* mnemonic_ptr = strdup(mnemonic.c_str());
@@ -4900,4 +4900,4 @@ volatile std::array<bool, 2> dummy = {
 };
 }
 }
-// clang-format on
+// clang-format on
\ No newline at end of file
diff --git a/src/vm/interp/vm_tgc5c.cpp b/src/vm/interp/vm_tgc5c.cpp
index db5c0d4..7cd10ad 100644
--- a/src/vm/interp/vm_tgc5c.cpp
+++ b/src/vm/interp/vm_tgc5c.cpp
@@ -343,7 +343,7 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
             uint32_t inst_index = instr_decoder.decode_instr(instr);
             opcode_e inst_id = arch::traits<ARCH>::opcode_e::MAX_OPCODE;;
             if(inst_index <instr_descr.size())
-                inst_id = instr_descr.at(instr_decoder.decode_instr(instr)).op;
+                inst_id = instr_descr[inst_index].op;
 
             // pre execution stuff
             this->core.reg.last_branch = 0;
@@ -1458,7 +1458,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                 case arch::traits<ARCH>::opcode_e::ECALL: {
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, "ecall");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = "ecall";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 4;
@@ -1471,7 +1473,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                 case arch::traits<ARCH>::opcode_e::EBREAK: {
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, "ebreak");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = "ebreak";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 4;
@@ -1484,7 +1488,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                 case arch::traits<ARCH>::opcode_e::MRET: {
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, "mret");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = "mret";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 4;
@@ -1497,7 +1503,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                 case arch::traits<ARCH>::opcode_e::WFI: {
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, "wfi");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = "wfi";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 4;
@@ -1721,7 +1729,7 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
                         auto mnemonic = fmt::format(
-                            "{mnemonic:10} {rs1}, {rd}, {imm}", fmt::arg("mnemonic", "fence.i"),
+                            "{mnemonic:10} {rs1}, {rd}, {imm}", fmt::arg("mnemonic", "fence_i"),
                             fmt::arg("rs1", name(rs1)), fmt::arg("rd", name(rd)), fmt::arg("imm", imm));
                         this->core.disass_output(pc.val, mnemonic);
                     }
@@ -2095,7 +2103,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                     uint8_t nzimm = ((bit_sub<2,5>(instr)) | (bit_sub<12,1>(instr) << 5));
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, "c.nop");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = "c.nop";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 2;
@@ -2201,7 +2211,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                     uint8_t rd = ((bit_sub<7,5>(instr)));
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, ".reserved_clui");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = ".reserved_clui";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 2;
@@ -2520,7 +2532,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                 case arch::traits<ARCH>::opcode_e::__reserved_cmv: {
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, ".reserved_cmv");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = ".reserved_cmv";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 2;
@@ -2586,7 +2600,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                 case arch::traits<ARCH>::opcode_e::C__EBREAK: {
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, "c.ebreak");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = "c.ebreak";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 2;
@@ -2625,7 +2641,9 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
                 case arch::traits<ARCH>::opcode_e::DII: {
                     if(this->disass_enabled){
                         /* generate console output when executing the command */
-                        this->core.disass_output(pc.val, "dii");
+                        //No disass specified, using instruction name
+                        std::string mnemonic = "dii";
+                        this->core.disass_output(pc.val, mnemonic);
                     }
                     // used registers// calculate next pc value
                     *NEXT_PC = *PC + 2;
diff --git a/src/vm/llvm/vm_tgc5c.cpp b/src/vm/llvm/vm_tgc5c.cpp
index 6f098c0..7e2de93 100644
--- a/src/vm/llvm/vm_tgc5c.cpp
+++ b/src/vm/llvm/vm_tgc5c.cpp
@@ -2415,7 +2415,7 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "ecall";
             std::vector<Value*> args {
                 this->core_ptr,
@@ -2450,7 +2450,7 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "ebreak";
             std::vector<Value*> args {
                 this->core_ptr,
@@ -2485,7 +2485,7 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "mret";
             std::vector<Value*> args {
                 this->core_ptr,
@@ -2520,7 +2520,7 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "wfi";
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3502,7 +3502,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__addi4spn"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.addi4spn"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3552,7 +3552,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c__lw"),
+                "{mnemonic:10} {rd}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c.lw"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("uimm", uimm), fmt::arg("rs1", name(8+rs1)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3602,7 +3602,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs2}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c__sw"),
+                "{mnemonic:10} {rs2}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c.sw"),
                 fmt::arg("rs2", name(8+rs2)), fmt::arg("uimm", uimm), fmt::arg("rs1", name(8+rs1)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3649,7 +3649,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__addi"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.addi"),
                 fmt::arg("rs1", name(rs1)), fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3698,8 +3698,8 @@ private:
         uint8_t nzimm = ((bit_sub<2,5>(instr)) | (bit_sub<12,1>(instr) << 5));
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
-            std::string mnemonic = "c__nop";
+            //No disass specified, using instruction name
+            std::string mnemonic = "c.nop";
             std::vector<Value*> args {
                 this->core_ptr,
                 this->gen_const(64, pc.val),
@@ -3733,7 +3733,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c__jal"),
+                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c.jal"),
                 fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3776,7 +3776,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__li"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.li"),
                 fmt::arg("rd", name(rd)), fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3822,7 +3822,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__lui"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.lui"),
                 fmt::arg("rd", name(rd)), fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3865,7 +3865,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {nzimm:#05x}", fmt::arg("mnemonic", "c__addi16sp"),
+                "{mnemonic:10} {nzimm:#05x}", fmt::arg("mnemonic", "c.addi16sp"),
                 fmt::arg("nzimm", nzimm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3912,8 +3912,8 @@ private:
         uint8_t rd = ((bit_sub<7,5>(instr)));
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
-            std::string mnemonic = "__reserved_clui";
+            //No disass specified, using instruction name
+            std::string mnemonic = ".reserved_clui";
             std::vector<Value*> args {
                 this->core_ptr,
                 this->gen_const(64, pc.val),
@@ -3949,7 +3949,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c__srli"),
+                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c.srli"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("shamt", shamt));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -3991,7 +3991,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c__srai"),
+                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c.srai"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("shamt", shamt));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4051,7 +4051,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__andi"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.andi"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4095,7 +4095,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__sub"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.sub"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4139,7 +4139,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__xor"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.xor"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4181,7 +4181,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__or"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.or"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4223,7 +4223,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__and"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.and"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4264,7 +4264,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c__j"),
+                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c.j"),
                 fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4304,7 +4304,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__beqz"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.beqz"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4355,7 +4355,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__bnez"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.bnez"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4406,7 +4406,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {nzuimm}", fmt::arg("mnemonic", "c__slli"),
+                "{mnemonic:10} {rs1}, {nzuimm}", fmt::arg("mnemonic", "c.slli"),
                 fmt::arg("rs1", name(rs1)), fmt::arg("nzuimm", nzuimm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4455,7 +4455,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, sp, {uimm:#05x}", fmt::arg("mnemonic", "c__lwsp"),
+                "{mnemonic:10} {rd}, sp, {uimm:#05x}", fmt::arg("mnemonic", "c.lwsp"),
                 fmt::arg("rd", name(rd)), fmt::arg("uimm", uimm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4509,7 +4509,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__mv"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.mv"),
                 fmt::arg("rd", name(rd)), fmt::arg("rs2", name(rs2)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4554,7 +4554,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c__jr"),
+                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c.jr"),
                 fmt::arg("rs1", name(rs1)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4599,8 +4599,8 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
-            std::string mnemonic = "__reserved_cmv";
+            //No disass specified, using instruction name
+            std::string mnemonic = ".reserved_cmv";
             std::vector<Value*> args {
                 this->core_ptr,
                 this->gen_const(64, pc.val),
@@ -4636,7 +4636,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__add"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.add"),
                 fmt::arg("rd", name(rd)), fmt::arg("rs2", name(rs2)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4686,7 +4686,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c__jalr"),
+                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c.jalr"),
                 fmt::arg("rs1", name(rs1)));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4736,8 +4736,8 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
-            std::string mnemonic = "c__ebreak";
+            //No disass specified, using instruction name
+            std::string mnemonic = "c.ebreak";
             std::vector<Value*> args {
                 this->core_ptr,
                 this->gen_const(64, pc.val),
@@ -4773,7 +4773,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs2}, {uimm:#05x}(sp)", fmt::arg("mnemonic", "c__swsp"),
+                "{mnemonic:10} {rs2}, {uimm:#05x}(sp)", fmt::arg("mnemonic", "c.swsp"),
                 fmt::arg("rs2", name(rs2)), fmt::arg("uimm", uimm));
             std::vector<Value*> args {
                 this->core_ptr,
@@ -4822,7 +4822,7 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            //This disass is not yet implemented
+            //No disass specified, using instruction name
             std::string mnemonic = "dii";
             std::vector<Value*> args {
                 this->core_ptr,
diff --git a/src/vm/tcc/vm_tgc5c.cpp b/src/vm/tcc/vm_tgc5c.cpp
index 2aa5ab6..2c19cbe 100644
--- a/src/vm/tcc/vm_tgc5c.cpp
+++ b/src/vm/tcc/vm_tgc5c.cpp
@@ -133,6 +133,7 @@ protected:
         return (from & mask) | ((from & sign_mask) ? ~mask : 0);
     }
 
+
 private:
     /****************************************************************************
      * start opcode definitions
@@ -1881,7 +1882,9 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "ecall");
+            //No disass specified, using instruction name
+            std::string mnemonic = "ecall";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 4;
@@ -1905,7 +1908,9 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "ebreak");
+            //No disass specified, using instruction name
+            std::string mnemonic = "ebreak";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 4;
@@ -1929,7 +1934,9 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "mret");
+            //No disass specified, using instruction name
+            std::string mnemonic = "mret";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 4;
@@ -1953,7 +1960,9 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "wfi");
+            //No disass specified, using instruction name
+            std::string mnemonic = "wfi";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 4;
@@ -2646,7 +2655,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__addi4spn"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.addi4spn"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2683,7 +2692,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c__lw"),
+                "{mnemonic:10} {rd}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c.lw"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("uimm", uimm), fmt::arg("rs1", name(8+rs1)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2716,7 +2725,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs2}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c__sw"),
+                "{mnemonic:10} {rs2}, {uimm:#05x}({rs1})", fmt::arg("mnemonic", "c.sw"),
                 fmt::arg("rs2", name(8+rs2)), fmt::arg("uimm", uimm), fmt::arg("rs1", name(8+rs1)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2747,7 +2756,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__addi"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.addi"),
                 fmt::arg("rs1", name(rs1)), fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2783,7 +2792,9 @@ private:
         uint8_t nzimm = ((bit_sub<2,5>(instr)) | (bit_sub<12,1>(instr) << 5));
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "c__nop");
+            //No disass specified, using instruction name
+            std::string mnemonic = "c.nop";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 2;
@@ -2807,7 +2818,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c__jal"),
+                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c.jal"),
                 fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2840,7 +2851,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__li"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.li"),
                 fmt::arg("rd", name(rd)), fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2876,7 +2887,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c__lui"),
+                "{mnemonic:10} {rd}, {imm:#05x}", fmt::arg("mnemonic", "c.lui"),
                 fmt::arg("rd", name(rd)), fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2909,7 +2920,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {nzimm:#05x}", fmt::arg("mnemonic", "c__addi16sp"),
+                "{mnemonic:10} {nzimm:#05x}", fmt::arg("mnemonic", "c.addi16sp"),
                 fmt::arg("nzimm", nzimm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -2943,7 +2954,9 @@ private:
         uint8_t rd = ((bit_sub<7,5>(instr)));
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "__reserved_clui");
+            //No disass specified, using instruction name
+            std::string mnemonic = ".reserved_clui";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 2;
@@ -2969,7 +2982,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c__srli"),
+                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c.srli"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("shamt", shamt));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3000,7 +3013,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c__srai"),
+                "{mnemonic:10} {rs1}, {shamt}", fmt::arg("mnemonic", "c.srai"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("shamt", shamt));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3039,7 +3052,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__andi"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.andi"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3070,7 +3083,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__sub"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.sub"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3101,7 +3114,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__xor"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.xor"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3132,7 +3145,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__or"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.or"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3163,7 +3176,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__and"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.and"),
                 fmt::arg("rd", name(8+rd)), fmt::arg("rs2", name(8+rs2)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3193,7 +3206,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c__j"),
+                "{mnemonic:10} {imm:#05x}", fmt::arg("mnemonic", "c.j"),
                 fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3224,7 +3237,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__beqz"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.beqz"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3259,7 +3272,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c__bnez"),
+                "{mnemonic:10} {rs1}, {imm:#05x}", fmt::arg("mnemonic", "c.bnez"),
                 fmt::arg("rs1", name(8+rs1)), fmt::arg("imm", imm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3294,7 +3307,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}, {nzuimm}", fmt::arg("mnemonic", "c__slli"),
+                "{mnemonic:10} {rs1}, {nzuimm}", fmt::arg("mnemonic", "c.slli"),
                 fmt::arg("rs1", name(rs1)), fmt::arg("nzuimm", nzuimm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3332,7 +3345,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, sp, {uimm:#05x}", fmt::arg("mnemonic", "c__lwsp"),
+                "{mnemonic:10} {rd}, sp, {uimm:#05x}", fmt::arg("mnemonic", "c.lwsp"),
                 fmt::arg("rd", name(rd)), fmt::arg("uimm", uimm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3369,7 +3382,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__mv"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.mv"),
                 fmt::arg("rd", name(rd)), fmt::arg("rs2", name(rs2)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3404,7 +3417,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c__jr"),
+                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c.jr"),
                 fmt::arg("rs1", name(rs1)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3439,7 +3452,9 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "__reserved_cmv");
+            //No disass specified, using instruction name
+            std::string mnemonic = ".reserved_cmv";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 2;
@@ -3465,7 +3480,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c__add"),
+                "{mnemonic:10} {rd}, {rs2}", fmt::arg("mnemonic", "c.add"),
                 fmt::arg("rd", name(rd)), fmt::arg("rs2", name(rs2)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3502,7 +3517,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c__jalr"),
+                "{mnemonic:10} {rs1}", fmt::arg("mnemonic", "c.jalr"),
                 fmt::arg("rs1", name(rs1)));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3541,7 +3556,9 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "c__ebreak");
+            //No disass specified, using instruction name
+            std::string mnemonic = "c.ebreak";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 2;
@@ -3567,7 +3584,7 @@ private:
         if(this->disass_enabled){
             /* generate console output when executing the command */
             auto mnemonic = fmt::format(
-                "{mnemonic:10} {rs2}, {uimm:#05x}(sp)", fmt::arg("mnemonic", "c__swsp"),
+                "{mnemonic:10} {rs2}, {uimm:#05x}(sp)", fmt::arg("mnemonic", "c.swsp"),
                 fmt::arg("rs2", name(rs2)), fmt::arg("uimm", uimm));
             tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
@@ -3600,7 +3617,9 @@ private:
         uint64_t PC = pc.val;
         if(this->disass_enabled){
             /* generate console output when executing the command */
-            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, "dii");
+            //No disass specified, using instruction name
+            std::string mnemonic = "dii";
+            tu("print_disass(core_ptr, {:#x}, \"{}\");", pc.val, mnemonic);
         }
         auto cur_pc_val = tu.constant(pc.val, traits::reg_bit_widths[traits::PC]);
         pc=pc+ 2;